| Duluth to Cosham | 3,880.05 mi (6,244.33 km) |
| Duluth to Costessey | 3,889.10 mi (6,258.90 km) |
| Duluth to Cottingham | 3,789.89 mi (6,099.24 km) |
| Duluth to Coulsdon | 3,894.41 mi (6,267.45 km) |
| Duluth to Coventry | 3,803.87 mi (6,121.74 km) |
| Duluth to Cowdenbeath | 3,606.45 mi (5,804.02 km) |
| Duluth to Cowes | 3,874.85 mi (6,235.97 km) |
| Duluth to Cowley | 3,874.15 mi (6,234.85 km) |
| Duluth to Cowley | 3,840.15 mi (6,180.13 km) |
| Duluth to Cramlington | 3,702.01 mi (5,957.80 km) |
| Duluth to Cranleigh | 3,889.58 mi (6,259.68 km) |
| Duluth to Crawley | 3,901.03 mi (6,278.10 km) |
| Duluth to Crayford | 3,900.70 mi (6,277.57 km) |
| Duluth to Crewe | 3,745.32 mi (6,027.51 km) |
| Duluth to Crigglestone | 3,756.99 mi (6,046.29 km) |
